Easily get recommendations on your site by adding the Google +1 add-on. Your visitors can click this simple button and with their Google accounts, they can recommend your website. The count will show up on your page as well as Google search. You can put this button on one page of your website, or all of them!
What does Google have to say about it:
"The +1 button is shorthand for "this is pretty cool" or "you should check this out."
Click +1 to publicly give something your stamp of approval. Your +1's can help friends, contacts, and others on the web find the best stuff when they search." http://www.google.com/+1/button/
Here's an example of what a site looks like on Google search with a +1 button next to it:
And after people click your add-on, the number of people who have +1'd it will show up in Google search like this: